See if your current balance and contributions put you on track for retirement by your target age.
Rules of thumb (e.g. "save 15%" or "have 10× salary by 67") are starting points, but your target depends on the income you want in retirement. This calculator projects your 401(k) and IRA growth to your chosen retirement age and compares it to a target balance—either one you set or one derived from a desired retirement income and withdrawal rate (e.g. 4% rule).